Helen is much more kind to her youngest child than to the others,___________ of course, make the others unhappy.
______ being fun and good exercise ,swimming is a very useful skill.
Come and see me whenever ____.
It is strange that he _________ in such an important examination .
After ten hours’ operation, the doctors managed to _____the one-year-old twins at the head.
It is greatly ________ that he gave back the money he found on the bus.